Grenville Was A Loyalist

He was one of the two representatives for Buckingham when he first entered Parliament in 1741, and he served as that borough's representative for the next 29 years, until his death. He regretted forgoing what seemed to be a bright legal career in favor of the unpredictability of opposition politics. He joined the "Boy Patriot" faction in Parliament, which was hostile to Sir Robert Walpole. He particularly benefited from the support of Lord Cobham, the head of the group known as Cobham's Cubs, which included George Grenville, his brother Richard, William Pitt, and George Lyttelton.

He was appointed a Lord of the Admiralty in Henry Pelham's ministry in December 1744. He joined forces with his brother Richard and William Pitt, who became their in-law in 1754, to defy Pelham's authority and delay business in order to force Pelham to promote them. Grenville was appointed Lord of the Treasury in June 1747. Grenville was appointed Privy Councilor and Navy Treasurer in 1754. He was fired in 1755, along with Pitt and a number of other colleagues, after speaking out and voting against the government during a discussion about a recent subsidy deal with Russia that they feared would be overly expensive and involve Britain in conflicts in Continental Europe. One of the pillars of Patriot Whig thought was opposition to involvement in European affairs.